M40 Maps and Junctions
The M40 is 89 miles long, so we split it into six stretches. Each has its own page with the junctions, the towns they serve, the latest reports and the traffic count for that part of the road.
Search all the latest M40 traffic news
Latest accident or incident on the M40
The most recent accident or incident on the M40 that we are aware of.
Latest active roadworks on the M40
Roadworks live on the M40 right now.
M40 northbound Jct 3 to Jct 4 hard shoulder closure
04:56 (4:56am)10 Nov 2026reported just now
- Location
- M40 northbound between J3 and J4
- Direction
- Northbound
- Lanes closed
- Hard shoulder closed
- Reason
- Tree and vegetation cutting work
- Schedule
- 10:20 (10:20am) Sun 1 Nov 2026 → 23:59 (11:59pm) Wed 11 Nov 2026
Latest planned roadworks on the M40
The next planned roadworks scheduled on the M40.
M40 Southbound, Jct 11 to Jct 10, lane 3 and 2 closure.
04:56 (4:56am)10 Nov 2026reported just now
- Location
- M40 southbound between J11 and J10
- Direction
- Southbound
- Lanes closed
- Lane closures
- Reason
- Maintenance work
- Schedule
- 21:00 (9pm) Mon 9 Nov 2026 → 06:00 (6am) Tue 10 Nov 2026
Forecast - not confirmed
+ 24 more planned roadworks - search all M40 traffic news →
Search all the latest M40 traffic news
Updated 04:57 (4:57am) Tue 10 Nov 2026
Powered by National Highways’ Transport Data Feeds.
The six stretches
- Junctions 1 to 4: Beaconsfield and High Wycombe — the London end, the M25 interchange and the busiest traffic on the road.
- Junctions 4 to 7: Stokenchurch and the Chilterns — the original 1967 motorway and the Stokenchurch Gap cutting.
- Junctions 7 to 9: Oxford — Thame, Wheatley, the A40 and the A34.
- Junctions 9 to 11: Bicester and Banbury — the A43 and Cherwell Valley services.
- Junctions 11 to 14: Gaydon and Leamington — into Warwickshire, with Warwick services.
- Junctions 14 to 16: Warwick to the M42 — the A46 and the end of the motorway.
The six stretches compared
The busiest main-line count on each stretch, from the Department for Transport road traffic statistics, 2025, in vehicles a day:
| Stretch | Busiest count | Where |
|---|---|---|
| Junctions 1 to 4 | 136,403 | J1A to J2 |
| Junctions 4 to 7 | 100,922 | J5 to J6 |
| Junctions 7 to 9 | 92,005 | J7 to J8 |
| Junctions 9 to 11 | 100,293 | J9 to J10 |
| Junctions 11 to 14 | 89,483 | J11 to J12 |
| Junctions 14 to 16 and the M42 | 113,433 | J14 to J15 |
The London stretch is clearly the heaviest, and the Warwick stretch is the busiest north of the Chilterns. The Oxford stretch includes the quietest main-line count on the road, 70,986 between Junctions 8 and 9.
The full junction list
For every junction number in one place, with the roads and towns each one serves, see the map of M40 motorway junctions.
Using a stretch page
Each stretch page shows the reports affecting that part of the M40 above, with the fixed information — what the junctions connect, and how much traffic the Department for Transport counted there in 2025 — underneath. It is the quickest way to check the part of the road you use most.
For the whole motorway at once, see the latest M40 traffic news.
Traffic count figures on this page are from the Department for Transport road traffic statistics, 2025.